/*
 *  Copyright 2010 Mikhail Titov.
 * 
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  under the License.
 */

package org.raven.auth;

/**
 *
 * @author Mikhail Titov
 */
public interface AuthProvider
{
    /**
     * Returns the name of the provider (the provider can present by the group of providers)
     * thats authenticate the user or null if user not authenticated
     * by this provider.
     * @param username the user name that must be authenticated
     * @param password the password of the user
     */
    public String authenticate(String username, String password);
}
